About this item NOT original branded, ours is a Compatible Replacement only, but is 100% compatible non-OEM high quality power supply cable. Power cord is very Brand-Model-Specific, please make sure that brand model are listed in this listing, if your brand model is not listed here, please send us a question to confirm compatibility. You can connect this power cable to USB port on wall or plug into USB power adapter’s 5V input port for charging. Over Voltage output Protection, Over Current output Protection. Short Circuit output Protection. Please note: Rechargeable batteries don’t last forever, the average battery last 1 to 3 years. If the battery is old/dead, it will not accept a charge. This is not a power cable’s problem. If you’re not sure whether battery or charger or cable is dead or not, you must have a voltmeter to test a charger. If still unsure, please send us an Amazon message so that we can provide more help.